Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86566ebb47150c6…

MALICIOUS

PDF

75.0 KB Created: 2021-03-22 16:13:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9b072c94cb287ab2406b589faa75e091 SHA-1: 6db8ee4970e2b3297ad6f9b8b93c9b50bd5e0727 SHA-256: e86566ebb47150c63be146c57b7a7b4f5966fa68969fd426a5c36a660a4f8603
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to disposable hosting or known malicious redirectors, indicating a phishing or scam attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly suggest malicious intent. The presence of 'powershell_command_line_editor.pdf' in the document text hints at potential execution of malicious scripts, though no direct script content was extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/strik?utm_term=can+i+buy+a+new+remote+for+my+panasonic+tv In PDF document text
    • http://keburej.22web.org/riwiga.pdfIn macro / runtime command snippet
    • http://asta-stroy.ru/71816249834otlbe.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/rolileduvof/3hojgja/puluwipetudukenebagerinu.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvaratuji/H9giXKx/does_coffee_increase_heart_rate.pdfIn PDF document text
    • https://cdn.sqhk.co/dagosasojo/gfAMhaz/wumujewokiliwulib.pdfIn PDF document text
    • https://cdn.sqhk.co/fosuzonarefi/gddKiiR/24982110968.pdfIn PDF document text
    • https://cdn.sqhk.co/papedajapej/Fovgg3V/85751364467.pdfIn PDF document text
    • http://weinmvc.net/646171157308dlou.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/cThijeb/environmental_scientist_or_specialist_jobs_near_me.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/xofage.pdfIn PDF document text
    • http://josowivofowog.iblogger.org/why_is_my_sewing_machine_stuck.pdfIn PDF document text
    • http://bigtittybella.com/8528136445278r5d.pdfIn PDF document text
    • http://helpcontactform.com/xudawigunozoku6c4az.pdfIn PDF document text
    • http://muxuvulumikabu.epiIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fizebozemugi.epizy.com/windows_powershell_command_line_editor.pdfIn PDF document text
    • http://muxuvulumikabu.epizy.com/24690878914.pdfIn PDF document text
    • http://kepinud.rf.gd/basara_2_apk_obb.pdfIn macro / runtime command snippet
    • http://lunewexaxepo.epizy.com/sasapetoxulo.pdfIn PDF document text
    • http://retiziwo.myartsonline.com/modern_arabic_language.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE640 5428 bytes
SHA-256: 93b008672c1ebd55949d91f56bc0e68baec19d3ef1400f36e85633c6b87bfee7
font_01_sfnt_off0000f8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 11228 bytes
SHA-256: 426e33d9950abbdca38c0efa026050b9e7717e1236a873ca98a416d1e6a0f9d4

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